Cellulose-ether composition



Patented Sept. 4, 1923."

UNITED STATES PATENT OFFICE- STEWART J'.- CARROLL, or ROCHESTER, NEW YoRR, AssIoNoR To EASTMAN xonax COMPANY, or ROCHESTER, NEW YORK, A CORI'OBATION on NEW YoRx.

GELLULOSE-ETHER COMPOSITION.

I No Drawing.

To all whom it may concern:

Be it known that I, STEWART J. CARRoLL, a citizen of the United States of America, residing at Rochester in the county of Monroe and State of ld'ew York, have invented certain new and useful Improvements in Cellulose-Ether Compositions, of which the following is. a full, clear, and exact 1 specification. This invention relates to new composttions of matter in which cellulose others are mixed with other substances so that they can be advantageously used in the plastic and analogous arts, such, for example, as sheet or film or varnish manufacture.

One object of my invention is to provide compositions of increased utility 1n the plastic and analogous arts. Another ob ect of my invention is to provide compositions which may be made into strong, flexible, transparent films, moulded articles, etc. Further objects will'hereinafter appear.

I have discovered that a composition of matter having these desired characteristics can be obtained by mixing or compounding.

cellulose ether, say of the type indicated in U. S. Patent 1,188,37 6, Lilienfeld, J une 20,

1916, with acetophenone. In the preferred forms of my invention I may add one or more of the following al 1 compounds: monohydroxy aliphatic alcohols of less than six carbon atoms, the acetates of such alcohols, acetone. While acetophenone, by itself, is a useful solvent for film maklng I prefer to use with it, one or more volatile vehiclesto carry the ingredients and control evaporation, such as ethyl alcohol, methyl 1 alcohol, ethyl acetate, methyl acetate, acetone. By way of illustration, I may dissolve cellulose other, like Water-insoluble ethyl cellulose, in acetophenone, say one part by weight of the ether to from 4 to 6 parts of the solvent. I prefer, however, to use from from 10 to 90 parts of. said alkyl compounds, such as methy acetate. For instance, an excellent viscous film-making dope i repared Application filed March 3, 1922. Serial No. 540,856.

phate, camphor, monochlornaphthalene, etc.

The ingredients are of the commercialtype, sufficiently purified for the purpose in view. For film dopes, they are prepared to yield films of the proper relative freedom from color. Because of low volatilityconsiderable amounts of acetophenone remain in the 'film and impart useful qualities thereto.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is v 1. A composition of matter comprising cellulose etherand acetophenone.

- 2. A compositiion of matter, comprising cellulose ether dissolved in acetophenone and a volatile vehicle carrying said other and said acetophenone.

3. A composition of matter comprisin cellulose ether, acetophenone and methy acetate. I

4. A compositionof matter comprising cellulose ether dissolved in a mixture con taining from 90 to 10 parts by weight of acetophenone and 10 to parts of a volatile vehicle carrying said ingredients.

5. A viscous flowable composition comprising one part by weight of water-insolw ble ethyl cellulose, and from 4 to 6 parts of a solvent containing aceto henone.

6. As an article of manufiicture, a depos ited or flowed film comprisingcellulose ether and acetophenone.

7. As an article of manufacture, a deposited or flowed flexible film comprising waterinsoluble ethyl cellulose and acetophenone. 45 90 to 10 parts of acetophenone mixed with Signed at Rochester, New York, this 27th day of February, 1922.:

\ STEWART J. CARROLL; 

